Or should I say where are they located on a snake? I was reading on somewhere that was talking about identifying snakes by their sheds(this was just pertaining to the snakes of New Mexico apperantly). It says "The key is in the caudal scales, posterior to the cloaca (anal vent). Split
caudals indicate a nonvenomous species in New Mexico. Solid caudals, especially
on a big shed, mean rattlesnake. There is one exception to this rule here.
Garter snakes have solid caudal scales as well."

On first guess I was assuming it meant the tail scales, like the ones below the vent, beacause the scales change after the vent and seem "split" in a sense. But, if garters have solid caudals then I have to be wrong. So what are they?!